[Bug 1309921] Re: Upgrade From Ubuntu 12.04 to 14.04, fail with "An unresolvable problem occurred while calculating the upgrade."

[Donnie]

*** This bug is a duplicate of bug 1308338 ***
    https://bugs.launchpad.net/bugs/1308338

 Removing ATI drivers and fightgear, the issue is solved.

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https://bugs.launchpad.net/bugs/1309921

Title:
  Upgrade From Ubuntu 12.04 to 14.04, fail with "An unresolvable problem
  occurred while calculating the upgrade."

Status in “update-manager” package in Ubuntu:
  New

Bug description:
  1. type "sudo update-manager -d" in the terminal.
  2. E:错误，pkgProblemResolver::Resolve

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.13
  ProcVersionSignature: Ubuntu 3.2.0-60.91-generic 3.2.55
  Uname: Linux 3.2.0-60-generic x86_64
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  Date: Sat Apr 19 18:58:59 2014
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1397904438
   com.ubuntu.update-manager window-height 500
   com.ubuntu.update-manager window-width 600
  InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20120426-19:46
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=zh_CN:
   TERM=xterm
   PATH=(custom, no user)
   LANG=zh_CN.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  Symptom: ubuntu-release-upgrader-core
  UpgradeStatus: Upgraded to precise on 2014-04-19 (0 days ago)
  VarLogDistupgradeTermlog:

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